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MYOG: Backpack fabrics, features, and dimensions
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Ken T.
(kthompson) - MLife

Locale: All up in there
Re: it's anoying to put a subject up here, lol on 08/08/2014 19:57:57 MDT Print View

Not if you use the reply button in the header with the title instead of the post reply button at the bottom.

Just so people know.

Bill Townsend
(Olmanwilly) - MLife

Locale: Midwest
Re: Re: it's anoying to put a subject up here, lol on 08/10/2014 09:27:27 MDT Print View

Well... Look at that, lol
Too much reading here and not much posting.

Sam Farrington
(scfhome) - M

Locale: Chocorua NH, USA
MYOG packs on 08/24/2014 21:27:01 MDT Print View

Thank you for sharing your experiences with the different fabrics and constructions.
That is the only way we make MYOG progress. Otherwise the amount of guessing gets very expensive. So your article is much appreciated.

You mentioned the annoyance of pocket construction. One thing I've tried with good results, especially where the pockets will hold water containers or wet stuff, is to sew opposite sides of a rectangle to the pack with the amount of slack in the rectangle equivalent to the amount of space desired in the pocket. Lace loops are sewn at intervals on the bottom of the rectangle. Then lace is passed through the loops and joined at its ends with a knot, creating a 'bottom' for the pocket. The same thing can be done at the pocket top, with a cord lock on the lace that joins the loops so that water containers, fording shoes and other wet stuff can be firmly secured in the pocket.

That's what was done on this pack, although the photo is not very clear:
But the same construction could be used for pockets at other locations.
The local bootmaker tells me lace or narrow webbing loops will pull out, but I like them because they can be stitched in place with as strong a thread and as many stitches as are needed to produce the desired strength.

For a wide pocket on the back of the pack, I'd use zig-zag lacing along the bottom connecting laces sewn to the pocket bottom and to the pack, the latter preferably at a seam. No more need to sew box-shaped structures and sew tape over the inside of all the seams.

Edited by scfhome on 08/24/2014 21:29:36 MDT.

David Chenault
(DaveC) - BPL Staff - F

Locale: Crown of the Continent
Re: MYOG: fabric update on 11/30/2014 21:46:00 MST Print View

I'd like to give folks a few updates on fabrics since I wrote this, in particular the 150D cuben hybrid. Meredith has been using the pack shown in the bottom photo all year, most notably a longer technical trip in the Grand Canyon, as good a test as any for a heavier use fabric.

To provide more details, the front and sides of that pack are cuben hybrid. The bottom is a single layer of VX42. The bottom of the side panels (below the side pockets) is a double layer of cuben hybrid. The seam joining the VX42 and cuben hybrid (transitioning from the bottom to the front) was double stitched, felled, and double stitched again.

After the Grand Canyon trip a steady line of small holes were visible 5mm or so above said seam in the cuben of the front panel. The scarp of VX42 I had at the time was only so big, and ideally would have wrapped up another few inches. I am convinced that while the 150D cuben hybrid is a great fabric (the waterproofing really is impressive) the modest abrasion resistant coupled with the cost makes it difficult to recommend. For me.

If you don't beat on things so much it will surely hold up just fine, but I'd suggest considering X33 instead. Weight is comparable, waterproofing is equivalent, as is abrasion resistance. X33 is quite a bit more flexible and quiet than hybrid cuben, and in the only color currently available at retail (multicam, sadly) somewhat translucent, making dark corners easy to explore for small items. I've made two packs with it in the past six months, and have been quite pleased. The one I took on the aforementioned trip survived unscathed, though it did have a 1000D cordura bottom and 2-3" of reinforcement up the front and sides.

(K.Kading) - MLife

Locale: Carson Range
Re: Re: MYOG: fabric update on 12/01/2014 12:58:05 MST Print View

Thanks for the update Dave.

Henk Smees
(theflyingdutchman) - MLife

Locale: Spanish Mountains
Re: Re: pictures are missing on 02/03/2015 07:40:56 MST Print View

Hi Dave,
The pictures Roman pointed out in July, seem to be still missing. Any problem fixing this (or forgotten, maybe not worthwhile)?